Dark circles under a girls eyes. The term is derived from the girls looking sickly, therefore possibly bitten by a virus ridden monkey. There are a certain subset of guys who have a fetish for this look. Some may say they are "smitten for the bitten". This look can be achieved via makeup, lack of sleep, and heroin use. Also called MonkeyBites

"wow!! will you get a look at that girl!! she is hot!!" "no way dude she is monkeybitten".